/** 
  * jQuery MD5 hash algorithm function 
  *  
  *      <code> 
  *              Calculate the md5 hash of a String  
  *              String $.md5 ( String str ) 
  *      </code> 
  *  
  * Calculates the MD5 hash of str using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash.  
  * MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a 128-bit hash value. MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of data. The generated hash is also non-reversable. Data cannot be retrieved from the message digest, the digest uniquely identifies the data. 
  * MD5 was developed by Professor Ronald L. Rivest in 1994. Its 128 bit (16 byte) message digest makes it a faster implementation than SHA-1. 
  * This script is used to process a variable length message into a fixed-length output of 128 bits using the MD5 algorithm. It is fully compatible with UTF-8 encoding. It is very useful when u want to transfer encrypted passwords over the internet. If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag).  
  * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin. 
  *  
  * Example 
  *      Code 
  *              <code> 
  *                      $.md5("I'm Persian.");  
  *              </code> 
  *      Result 
  *              <code> 
  *                      "b8c901d0f02223f9761016cfff9d68df" 
  *              </code> 
  *  
  * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com > 
  * @link http://www.semnanweb.com/jquery-plugin/md5.html 
  * @see http://www.webtoolkit.info/ 
  * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License] 
  * @param {jQuery} {md5:function(string)) 
  * @return string 
  */ 
  
 (function($){ 
          
         var rotateLeft = function(lValue, iShiftBits) { 
                 return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits)); 
         } 
          
         var addUnsigned = function(lX, lY) { 
                 var lX4, lY4, lX8, lY8, lResult; 
                 lX8 = (lX & 0x80000000); 
                 lY8 = (lY & 0x80000000); 
                 lX4 = (lX & 0x40000000); 
                 lY4 = (lY & 0x40000000); 
                 lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF); 
                 if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8); 
                 if (lX4 | lY4) { 
                         if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8); 
                         else return (lResult ^ 0x40000000 ^ lX8 ^ lY8); 
                 } else { 
                         return (lResult ^ lX8 ^ lY8); 
                 } 
         } 
          
         var F = function(x, y, z) { 
                 return (x & y) | ((~ x) & z); 
         } 
          
         var G = function(x, y, z) { 
                 return (x & z) | (y & (~ z)); 
         } 
          
         var H = function(x, y, z) { 
                 return (x ^ y ^ z); 
         } 
          
         var I = function(x, y, z) { 
                 return (y ^ (x | (~ z))); 
         } 
          
         var FF = function(a, b, c, d, x, s, ac) { 
                 a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac)); 
                 return addUnsigned(rotateLeft(a, s), b); 
         }; 
          
         var GG = function(a, b, c, d, x, s, ac) { 
                 a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac)); 
                 return addUnsigned(rotateLeft(a, s), b); 
         }; 
          
         var HH = function(a, b, c, d, x, s, ac) { 
                 a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac)); 
                 return addUnsigned(rotateLeft(a, s), b); 
         }; 
          
         var II = function(a, b, c, d, x, s, ac) { 
                 a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac)); 
                 return addUnsigned(rotateLeft(a, s), b); 
         }; 
          
         var convertToWordArray = function(string) { 
                 var lWordCount; 
                 var lMessageLength = string.length; 
                 var lNumberOfWordsTempOne = lMessageLength + 8; 
                 var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64; 
                 var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16; 
                 var lWordArray = Array(lNumberOfWords - 1); 
                 var lBytePosition = 0; 
                 var lByteCount = 0; 
                 while (lByteCount < lMessageLength) { 
                         lWordCount = (lByteCount - (lByteCount % 4)) / 4; 
                         lBytePosition = (lByteCount % 4) * 8; 
                         lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition)); 
                         lByteCount++; 
                 } 
                 lWordCount = (lByteCount - (lByteCount % 4)) / 4; 
                 lBytePosition = (lByteCount % 4) * 8; 
                 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition); 
                 lWordArray[lNumberOfWords - 2] = lMessageLength << 3; 
                 lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29; 
                 return lWordArray; 
         }; 
          
         var wordToHex = function(lValue) { 
                 var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount; 
                 for (lCount = 0; lCount <= 3; lCount++) { 
                         lByte = (lValue >>> (lCount * 8)) & 255; 
                         WordToHexValueTemp = "0" + lByte.toString(16); 
                         WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2); 
                 } 
                 return WordToHexValue; 
         }; 
          
         var uTF8Encode = function(string) { 
                 string = string.replace(/\x0d\x0a/g, "\x0a"); 
                 var output = ""; 
                 for (var n = 0; n < string.length; n++) { 
                         var c = string.charCodeAt(n); 
                         if (c < 128) { 
                                 output += String.fromCharCode(c); 
                         } else if ((c > 127) && (c < 2048)) { 
                                 output += String.fromCharCode((c >> 6) | 192); 
                                 output += String.fromCharCode((c & 63) | 128); 
                         } else { 
                                 output += String.fromCharCode((c >> 12) | 224); 
                                 output += String.fromCharCode(((c >> 6) & 63) | 128); 
                                 output += String.fromCharCode((c & 63) | 128); 
                         } 
                 } 
                 return output; 
         }; 
          
         $.extend({ 
                 md5: function(string) { 
                         var x = Array(); 
                         var k, AA, BB, CC, DD, a, b, c, d; 
                         var S11=7, S12=12, S13=17, S14=22; 
                         var S21=5, S22=9 , S23=14, S24=20; 
                         var S31=4, S32=11, S33=16, S34=23; 
                         var S41=6, S42=10, S43=15, S44=21; 
                         string = uTF8Encode(string); 
                         x = convertToWordArray(string); 
                         a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476; 
                         for (k = 0; k < x.length; k += 16) { 
                                 AA = a; BB = b; CC = c; DD = d; 
                                 a = FF(a, b, c, d, x[k+0],  S11, 0xD76AA478); 
                                 d = FF(d, a, b, c, x[k+1],  S12, 0xE8C7B756); 
                                 c = FF(c, d, a, b, x[k+2],  S13, 0x242070DB); 
                                 b = FF(b, c, d, a, x[k+3],  S14, 0xC1BDCEEE); 
                                 a = FF(a, b, c, d, x[k+4],  S11, 0xF57C0FAF); 
                                 d = FF(d, a, b, c, x[k+5],  S12, 0x4787C62A); 
                                 c = FF(c, d, a, b, x[k+6],  S13, 0xA8304613); 
                                 b = FF(b, c, d, a, x[k+7],  S14, 0xFD469501); 
                                 a = FF(a, b, c, d, x[k+8],  S11, 0x698098D8); 
                                 d = FF(d, a, b, c, x[k+9],  S12, 0x8B44F7AF); 
                                 c = FF(c, d, a, b, x[k+10], S13, 0xFFFF5BB1); 
                                 b = FF(b, c, d, a, x[k+11], S14, 0x895CD7BE); 
                                 a = FF(a, b, c, d, x[k+12], S11, 0x6B901122); 
                                 d = FF(d, a, b, c, x[k+13], S12, 0xFD987193); 
                                 c = FF(c, d, a, b, x[k+14], S13, 0xA679438E); 
                                 b = FF(b, c, d, a, x[k+15], S14, 0x49B40821); 
                                 a = GG(a, b, c, d, x[k+1],  S21, 0xF61E2562); 
                                 d = GG(d, a, b, c, x[k+6],  S22, 0xC040B340); 
                                 c = GG(c, d, a, b, x[k+11], S23, 0x265E5A51); 
                                 b = GG(b, c, d, a, x[k+0],  S24, 0xE9B6C7AA); 
                                 a = GG(a, b, c, d, x[k+5],  S21, 0xD62F105D); 
                                 d = GG(d, a, b, c, x[k+10], S22, 0x2441453); 
                                 c = GG(c, d, a, b, x[k+15], S23, 0xD8A1E681); 
                                 b = GG(b, c, d, a, x[k+4],  S24, 0xE7D3FBC8); 
                                 a = GG(a, b, c, d, x[k+9],  S21, 0x21E1CDE6); 
                                 d = GG(d, a, b, c, x[k+14], S22, 0xC33707D6); 
                                 c = GG(c, d, a, b, x[k+3],  S23, 0xF4D50D87); 
                                 b = GG(b, c, d, a, x[k+8],  S24, 0x455A14ED); 
                                 a = GG(a, b, c, d, x[k+13], S21, 0xA9E3E905); 
                                 d = GG(d, a, b, c, x[k+2],  S22, 0xFCEFA3F8); 
                                 c = GG(c, d, a, b, x[k+7],  S23, 0x676F02D9); 
                                 b = GG(b, c, d, a, x[k+12], S24, 0x8D2A4C8A); 
                                 a = HH(a, b, c, d, x[k+5],  S31, 0xFFFA3942); 
                                 d = HH(d, a, b, c, x[k+8],  S32, 0x8771F681); 
                                 c = HH(c, d, a, b, x[k+11], S33, 0x6D9D6122); 
                                 b = HH(b, c, d, a, x[k+14], S34, 0xFDE5380C); 
                                 a = HH(a, b, c, d, x[k+1],  S31, 0xA4BEEA44); 
                                 d = HH(d, a, b, c, x[k+4],  S32, 0x4BDECFA9); 
                                 c = HH(c, d, a, b, x[k+7],  S33, 0xF6BB4B60); 
                                 b = HH(b, c, d, a, x[k+10], S34, 0xBEBFBC70); 
                                 a = HH(a, b, c, d, x[k+13], S31, 0x289B7EC6); 
                                 d = HH(d, a, b, c, x[k+0],  S32, 0xEAA127FA); 
                                 c = HH(c, d, a, b, x[k+3],  S33, 0xD4EF3085); 
                                 b = HH(b, c, d, a, x[k+6],  S34, 0x4881D05); 
                                 a = HH(a, b, c, d, x[k+9],  S31, 0xD9D4D039); 
                                 d = HH(d, a, b, c, x[k+12], S32, 0xE6DB99E5); 
                                 c = HH(c, d, a, b, x[k+15], S33, 0x1FA27CF8); 
                                 b = HH(b, c, d, a, x[k+2],  S34, 0xC4AC5665); 
                                 a = II(a, b, c, d, x[k+0],  S41, 0xF4292244); 
                                 d = II(d, a, b, c, x[k+7],  S42, 0x432AFF97); 
                                 c = II(c, d, a, b, x[k+14], S43, 0xAB9423A7); 
                                 b = II(b, c, d, a, x[k+5],  S44, 0xFC93A039); 
                                 a = II(a, b, c, d, x[k+12], S41, 0x655B59C3); 
                                 d = II(d, a, b, c, x[k+3],  S42, 0x8F0CCC92); 
                                 c = II(c, d, a, b, x[k+10], S43, 0xFFEFF47D); 
                                 b = II(b, c, d, a, x[k+1],  S44, 0x85845DD1); 
                                 a = II(a, b, c, d, x[k+8],  S41, 0x6FA87E4F); 
                                 d = II(d, a, b, c, x[k+15], S42, 0xFE2CE6E0); 
                                 c = II(c, d, a, b, x[k+6],  S43, 0xA3014314); 
                                 b = II(b, c, d, a, x[k+13], S44, 0x4E0811A1); 
                                 a = II(a, b, c, d, x[k+4],  S41, 0xF7537E82); 
                                 d = II(d, a, b, c, x[k+11], S42, 0xBD3AF235); 
                                 c = II(c, d, a, b, x[k+2],  S43, 0x2AD7D2BB); 
                                 b = II(b, c, d, a, x[k+9],  S44, 0xEB86D391); 
                                 a = addUnsigned(a, AA); 
                                 b = addUnsigned(b, BB); 
                                 c = addUnsigned(c, CC); 
                                 d = addUnsigned(d, DD); 
                         } 
                         var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d); 
                         return tempValue.toLowerCase(); 
                 } 
         }); 
 })(jQuery);  